Bob Mulrooney, Extension Plant Pathologist; bobmul@udel.edu
Disease Severity Value (DSV) Accumulation as of June 30, 2010 is as follows:
Location: Art and Keith Wicks Farm, Rt 9, Little Creek, Kent County.
Green row: May 6
| LATE BLIGHT | EARLY BLIGHT | |||
| Date | Daily DSV | Total DSV | Spray Recs | Accumulated P- days* |
| 6/11-6/12 | 1 | 37 | 7-days | 292 |
| 6/13-6/14 | 2 | 39 | 7-days | 305 |
| 6/15-6/16 | 0 | 39 | 7- days | 315 |
| 6/16-6/17 | 2 | 41 | 7-days | 325 |
| 6/18-6/20 | 0 | 41 | 7-10 days | 354 |
| 6/21 | 0 | 41 | 10 days | 360 |
| 6/22-6/23 | 1 | 42 | 10-days | 371 |
| 6/24-6/25 | 0 | 42 | 10-days | 381 |
| 6/26-6/27 | 0 | 42 | 10-days | 391 |
| 6/28–6/30 | 0 | 42 | 10-days | 408 |
There have been new reports of late blight on tomatoes from central and northern PA, Long Island NY and CT last week. These have been home gardens for the most part. The weather has not been favorable for late blight recently. There have been no reports from eastern shore VA, NJ or DE to date.
For specific fungicide recommendations, see the 2010 Delaware Commercial Vegetable Production Recommendations Book.